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88
Data Exchange Time Charts
Section 6-4
6-4-3
PC PUT/PC GET Timing
Data is written during the I/O refresh period immediately after the execution of
the PC PUT command. The ASCII Unit BASIC program continues execution.
Data is read at the I/O refresh immediately after the execution of the PC GET
command.
6-4-4
IOWR (#00
@@
)/IORD (#00
@@
) Timing
Data transfer occurs immediately after the IOWR (#00
@@
)/IORD (#00
@@
)
instruction is executed. The ASCII Unit BASIC program continues execution.
6-4-5
PC EPUT/PC EGET Timing
The internal shared memory is read/written to immediately when the execu-
tion of the PC EPUT/PC EGET command. The ASCII Unit’s BASIC program
continues execution.
ASCII
Unit
CPU
Unit
RUN
Allocated
I/O refresh
PC PUT
ASCII
Unit
CPU
Unit
RUN
PC GET
ASCII
Busy Flag
ASCII Unit
CPU Unit
RUN
IOWR (#00
@@
) instruction execution
Transfer of data to the shared memory
area by the IOWR (#00
@@
) instruction
ASCII Unit
CPU Unit
RUN (internal writing)
PC EPUT
command execution
Summary of Contents for C200H-ASC11
Page 1: ...C200H ASC11 ASC21 ASC31 ASCII Units Operation Manual Revised June 2000...
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